The VTOL pitch up at a large angle during take off and clash

I tired to take off my vtol in q_hover mode and then, it pitch up at a large angle during take off and clash.

please advise me to fix this problem
my flight log:

video during take off:

Specifications:

Wingspan: 3.16 m

Fuselage: 1.95 m

Frame Weight: 10 kg

Take-off Weight: 17-19 kg (include battery and propulsion)

propulsion:
motor
XRotor Pro X6 brushless motor with built-in ESC

battery quad system
Foxtech Diamond Series Semi-Solid-State Li-ion Battery 12s 16,000 mah 5c (continue) ,48.4v